Keihin Carb set up?

[JAD]

Hi all, this is my first post (after much reading!) ref jetting my new (to me) 2007 EC250.

The bike "peed" out fuel so I have removed the Keihin carb (screw top so I think it is an AS1) and meticulously cleaned everything and set the float height as per the instructions on here. Throttle cable is set correctly. Air filter is clean with fresh oil and mechanically the bike seems sound. The fuel no longer leaks and the bike starts well but has an unreliable and erratic idle which I am unable to stabilise using the techniques listed on here. The air screw (pilot?) is 1 turn out (360 degrees) and the idle screw is nearly all the way in. It will idle fast ish.. but dies after a short while. The plastic idle screw is super sensitive to even a tiny movement.


The current set up is 172, 35 with a N1EF needle in position 2 (*7 slide)

Having studied the jetting database it appears that in the UK (sea level up to 2000 ft) most people seem to fit 180, 45, and an LTR needle. I intend to do the same but I am struggling to find an "LTR" needle for sale.

Can anyone point me in the direction of a UK jet needle supplier please? (and what to ask for!)

Also, the jets appear to be available on amazon for very little money... are they likely to be low quality or does it matter? (I was thinking about buying a selection)

Thanks in advance and no doubt I will have many more questions as I attempt to get this bike sorted out!

Regards
John